What should the ohm resistance be on heater tube? I checked it and and it read 21.4
AP3183311 is your heater number
Answer Hello Ed,
As per the spec sheet for your unit, the resistance should be 18O, +/- 10%. Be sure when you test the heater assembly to tap on the assembly while testing for proper results. If tapping on it causes the reading to drop to no contact, the element has burned in to and is contacting intermittently.